By sending these details through, you will hopefully speed up the process of send out your prize, should you win!

You have two weeks (which is much longer than Batman's current oxygen supply) to submit your answers before we close the competition.

Good luck!

Right click here to download the Hi-Res version of the Competition Image or click the image on the announcement post for the full view. We highly recommend that you download the hi-res version though. It may make things more clear.

Terms & Conditions:

COMPETITION OPEN TO OVER 18’s ONLYDeadline: 23:59 BST 21/06/2015To enter: Send us a private message on our Facebook page with your answer, your name, address, date of birth & preferred format (PS4, XB1 or PC).We may ask for proof of age before shipping. We will only accept your first answer. The winners will be drawn from a pool of correct answers. Prize will ship ASAP once we’ve been in communication with the winner.

Well I just saw this, and I'm 14 anyway, but the answer is explosive gel. The thing that you need to know are that 1 liter = 1000 cc. Also, you can ignore the issues of volume and time, since we only need to know which is better, not how long it would take, or the amount of air needed. All we need is the average rate of air used.